The Waldmeier Effect and Asymmetry of Solar Magnetic Cycles in a Surface-Shear Dynamo Model

Details The Waldmeier Effect and Asymmetry of Solar Magnetic Cycles in a Surface-Shear Dynamo Model The Waldmeier Effect and Asymmetry of Solar Magnetic Cycles in a Surface-Shear Dynamo Model

May 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.0202p&link_type=abstract

American Astronomical Society, SPD meeting #42, #2.02; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a study of solar dynamo model distributed in the bulk of the convection zone with toroidal magnetic-field flux concentrated in a near-surface layer. We explore how this effect may depend on spatial variations of the turbulent parameters and the differential rotation near the surface. The model includes the magnetic helicity non-linear feedback on the dynamo alpha-effect. We compute the magnetic cycle characteristics predicted by the model, including the cycle skewness (associated with duration of the growth and decay phases) and the duration-strength dependence (Waldmeier's effects). We confront the theoretical expectations with the solar sunspot cycle properties.

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